/**
 * Copyright (C) 2014 Luvina Software Company
 * CharacterEncodingFilter.java, Dec 15, 2014, Nguyen Huu Luan LA11_AM
 *
 */
package net.luvina.manageuser.utils;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * CharacterEncodingFilter
 * 
 * @author luan
 * 
 */
public class CharacterEncodingFilter implements Filter {

	private static final String DEFAULT_ENCODING = "UTF-8";
	private String encoding = DEFAULT_ENCODING;

	/*
	 * (non-Javadoc)
	 * 
	 * @see javax.servlet.Filter#init(javax.servlet.FilterConfig)
	 */
	public void init(FilterConfig config) throws ServletException {
		String enc = config.getInitParameter("encoding");
		if (enc != null) {
			encoding = enc;
		}

	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see javax.servlet.Filter#destroy()
	 */
	public void destroy() {

	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see javax.servlet.Filter#doFilter(javax.servlet.ServletRequest,
	 * javax.servlet.ServletResponse, javax.servlet.FilterChain)
	 */
	public void doFilter(ServletRequest request, ServletResponse response,
			FilterChain chain) throws IOException, ServletException {
		HttpServletRequest req = (HttpServletRequest) request;
		HttpServletResponse res = (HttpServletResponse) response;
		req.setCharacterEncoding(encoding);
		res.setCharacterEncoding(encoding);
		chain.doFilter(req, res);
	}
}
